方法：对15例30眼门诊健康体检者行闪光视网膜电图检查，通频带为0.6～300Hz和0.6～70Hz时，分别测量a波、b波的隐含期及振幅，并进行对比分析，采用配对t检验。

结果：将通频带设置为0.6～70Hz时，a波、b波表现为单峰，对比通频带为0.6～300Hz时，a波、b波的隐含期延长，振幅下降(P<0.01)。

结论：将通频带设置为0.6～70Hz时能获得光滑的a波、b波波形，能准确测量a波、b波的隐含期及振幅。

METHODS: Full-field ERGs were recorded in 30 eyes of 15 physical check-ups, measured the implicit time and amplitude of a-, b-wave, when the passband was set at 0.6～300Hz and 0.6～70Hz, and correlation was performed among those results by paired t-test.

RESULTS: When the passband was set at 0.6～70Hz, a-, b-wave had a single peak, compared with the passband was set at 0.6～300Hz, the implicit time of a-, b-wave was prolonged, amplitude was decreased(P<0.01).

CONCLUSION: A passband of 0.6～70Hz was the best choice to obtain smooth a- and b-waves from the original ERG, It could accurately measure the implicit time and amplitude of a-, b-wave.